fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
...
fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
Starting 3 threads
Threads: 3
Threads: 3
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3721, got signal=6
Threads: 2: [m_F] [75.0% done] [   876/  8496 kb/s] [eta 00m:01s]
Threads: 2: [m_F] [66.7% done] [   428/     0 kb/s] [eta 00m:02s]
Threads: 2: [m_F] [62.5% done] [   252/     0 kb/s] [eta 00m:03s]
Threads: 2: [m_F] [66.7% done] [   420/   104 kb/s] [eta 00m:03s]
Threads: 2: [F_F] [100.0% done] [   320/  6960 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3720, got signal=6
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [70.0% done] [   396/     0 kb/s] [eta 00m:06s]
Threads: 1: [__V] [88.2% done] [ 29612/     0 kb/s] [eta 00m:02s]
Threads: 1: [__V] [100.0% done] [ 34424/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=3720
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=89.9%, 4=3.2%, 8=6.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=84.9%, 4=6.3%, 10=0.2%, 20=0.0%, 50=0.2%, 100=0.3%
     lat (msec): 250=2.4%, 500=2.6%, 750=2.1%, 1000=0.5%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3721
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=91.9%, 4=4.6%, 8=3.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=93.1%, 4=2.1%, 10=0.2%, 20=0.6%, 50=0.2%, 100=0.9%
     lat (msec): 250=2.0%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3722
  read : io=100MiB, bw=6,032KiB/s, runt= 17381msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  274, avg=18.42, stdev=33.38
    bw (KiB/s) : min=   11, max=39755, per=335.01%, avg=22090.56, stdev=16263.53
  write: io=95,552KiB, bw=6,902KiB/s, runt= 14176msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  171, avg= 0.55, stdev= 6.24
    bw (KiB/s) : min=    0, max=119488, per=284.47%, avg=59744.00, stdev=84490.78
  cpu          : usr=4.69%, sys=2.90%, ctx=6129
  IO depths    : 1=1.1%, 2=55.0%, 4=32.3%, 8=11.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.4%, 4=1.0%, 10=23.5%, 20=18.9%, 50=3.8%, 100=0.8%
     lat (msec): 250=2.4%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=109MiB, aggrb=6,594KiB/s, minb=0KiB/s, maxb=6,032KiB/s, mint=17381msec, maxt=17381msec
  WRITE: io=284MiB, aggrb=21,002KiB/s, minb=0KiB/s, maxb=6,902KiB/s, mint=17381msec, maxt=17381msec

Disk stats (read/write):
  sda: ios=1346/2297, merge=399/70278, ticks=21116/1674640, in_queue=1696700, util=98.19%
2.67user 1.17system 0:17.71elapsed 21%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2481minor)pagefaults 0swaps